Package org.gcube.informationsystem.utils

Class AttributeUtility

java.lang.Object
org.gcube.informationsystem.utils.AttributeUtility
public class AttributeUtility extends Object
A utility class for handling attribute-related operations.
Author:
Luca Frosini (ISTI - CNR)

  • Field Details

    • logger

      protected static org.slf4j.Logger logger
      The logger for this class.

  • Constructor Details

    • AttributeUtility

      public AttributeUtility()

  • Method Details

    • checkRegex

      public static void checkRegex(String regex, String text)
      Checks if a given text matches a regular expression.
      Parameters:
      regex - The regular expression.
      text - The text to check.
      Throws:
      RuntimeException - if the text does not match the regex or if the regex is invalid.

    • compareNumbers

      public static int compareNumbers(Number first, Number second)
      Compares two numbers by their decimal value, whatever their Java types.

      Each number is read from its shortest decimal representation, so that a Float compares as the decimal it was written as (e.g. 99.9f equals 99.9).

      Parameters:
      first - The first number.
      second - The second number.
      Returns:
      A negative integer, zero, or a positive integer as first is lower than, equal to, or greater than second.

    • isIntegral

      public static boolean isIntegral(Number number)
      Tells whether a number has no fractional part.
      Parameters:
      number - The number to check.
      Returns:
      true if number is an integer value, e.g. 3 or 3.0.

    • toIntegerBound

      public static Integer toIntegerBound(Number bound)
      Converts the bound of an attribute that only admits integer bounds.
      Parameters:
      bound - The bound, null for none.
      Returns:
      The bound as an Integer, null if bound is null.
      Throws:
      IllegalArgumentException - if bound is not an integer in the 32-bit range.

    • evaluateNullForDefaultValue

      public static String evaluateNullForDefaultValue(String defaultValueAsString)
      Evaluates a default value string, returning null if the string is "null".
      Parameters:
      defaultValueAsString - The default value as a string.
      Returns:
      The evaluated default value.

    • evaluateValueStringAccordingBaseType

      public static Object evaluateValueStringAccordingBaseType(PropertyTypeName.BaseType baseType, String valueAsString)
      Converts a string value to an object of the specified base type.
      Parameters:
      baseType - The target base type.
      valueAsString - The string value to convert.
      Returns:
      The converted object.

    • checkDateTimeString

      public static LocalDateTime checkDateTimeString(String dateTimeString) throws DateTimeParseException
      Checks if a string is a valid date-time string according to the standard pattern.
      Parameters:
      dateTimeString - The date-time string to check.
      Returns:
      The parsed LocalDateTime.
      Throws:
      DateTimeParseException - if the string is not a valid date-time.